/**
 * For a detailed explanation regarding each configuration property, visit:
 * https://jestjs.io/docs/configuration
 */

/** @type {import('jest').Config} */
const config = {
  // All imported modules in your tests should be mocked automatically
  // automock: false,

  // Stop running tests after `n` failures
  // bail: 0,

  // The directory where Jest should store its cached dependency information
  // cacheDirectory: "C:\\Users\\lys\\AppData\\Local\\Temp\\jest",

  // Automatically clear mock calls, instances, contexts and results before every test
  clearMocks: true,

  // Indicates whether the coverage information should be collected while executing the test
  collectCoverage: true,

  // An array of glob patterns indicating a set of files for which coverage information should be collected
  // 一组全局模式，指示应收集其覆盖范围信息的一组文件
  collectCoverageFrom: [
    // 'src/utils/**/*.{js,vue}',
    'src/**/*.{js,ts,tsx}',
    '!**/*.d.ts'
    // 'src/components/**/*.{js,vue}'
  ],

  // The directory where Jest should output its coverage files
  coverageDirectory: 'coverage',

  // An array of regexp pattern strings used to skip coverage collection
  coveragePathIgnorePatterns: ['\\\\node_modules\\\\', '/src/tscOutput/'],

  // Indicates which provider should be used to instrument code for coverage
  coverageProvider: 'v8',

  // A list of reporter names that Jest uses when writing coverage reports
  // coverageReporters: [
  //   "json",
  //   "text",
  //   "lcov",
  //   "clover"
  // ],

  // An object that configures minimum threshold enforcement for coverage results
  // coverageThreshold: undefined,

  // A path to a custom dependency extractor
  // dependencyExtractor: undefined,

  // Make calling deprecated APIs throw helpful error messages
  // errorOnDeprecated: false,

  // The default configuration for fake timers
  // fakeTimers: {
  //   "enableGlobally": false
  // },

  // Force coverage collection from ignored files using an array of glob patterns
  // forceCoverageMatch: [],

  // A path to a module which exports an async function that is triggered once before all test suites
  // globalSetup: undefined,

  // A path to a module which exports an async function that is triggered once after all test suites
  // globalTeardown: undefined,

  // A set of global variables that need to be available in all test environments
  // globals: {},

  // The maximum amount of workers used to run your tests. Can be specified as % or a number. E.g. maxWorkers: 10% will use 10% of your CPU amount + 1 as the maximum worker number. maxWorkers: 2 will use a maximum of 2 workers.
  // maxWorkers: "50%",

  // An array of directory names to be searched recursively up from the requiring module's location
  // moduleDirectories: [
  //   "node_modules"
  // ],

  // An array of file extensions your modules use
  // // 例如，require('./a') 语句会先找 `a.ts`，找不到找 `a.js`
  moduleFileExtensions: [
    'js',
    'mjs',
    'cjs',
    // "jsx",
    'ts'
    // "tsx",
    // "json",
    // "node"
  ],

  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
  // 从正则表达式到模块名称或模块名称数组的映射，允许使用单个模块存根资源
  moduleNameMapper: {
    '^@/(.*)$': '<rootDir>/src/$1',
    '^@utils/(.*)$': '<rootDir>/src/utils/$1',
    '^@web/(.*)$': '<rootDir>/src/web/$1'
  },

  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
  // modulePathIgnorePatterns: [],

  // Activates notifications for test results
  // notify: false,

  // An enum that specifies notification mode. Requires { notify: true }
  // notifyMode: "failure-change",

  // A preset that is used as a base for Jest's configuration
  // preset: undefined,

  // Run tests from one or more projects
  // projects: undefined,

  // Use this configuration option to add custom reporters to Jest
  // reporters: undefined,

  // Automatically reset mock state before every test
  // resetMocks: false,

  // Reset the module registry before running each individual test
  // resetModules: false,

  // A path to a custom resolver
  // resolver: undefined,

  // Automatically restore mock state and implementation before every test
  // restoreMocks: false,

  // The root directory that Jest should scan for tests and modules within
  // 字符串类型，这个就是设置 Jest 配置中 <rootDir> 模版字符串的值。默认就是 Jest 配置所在的目录，如果你的配置写在 package.json 文件中，那就是 package.json 文件所在的目录，如果都没有，则是你运行 jest 命令所在的目录。由于配置中经常用到，所以明白其含义是非常重要的。
  // rootDir: undefined,

  // A list of paths to directories that Jest should use to search for files in
  // Jest 用于搜索文件的目录的路径列表。(Default: ["<rootDir>"] )
  // roots: [
  //   "<rootDir>"
  // ],

  // Allows you to use a custom runner instead of Jest's default test runner
  // runner: "jest-runner",

  // The paths to modules that run some code to configure or set up the testing environment before each test
  // setupFiles: [],

  // A list of paths to modules that run some code to configure or set up the testing framework before each test
  // setupFilesAfterEnv: [],

  // The number of seconds after which a test is considered as slow and reported as such in the results.
  // slowTestThreshold: 5,

  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
  // snapshotSerializers: [],

  // The test environment that will be used for testing
  // 将用于测试的测试环境。Jest 中的默认环境是Node.js环境。如果要构建 Web 应用程序，则可以使用类似浏览器的环境 jsdom 。 通过在文件顶部添加 @jest-environment docblock，可以指定用于该文件中所有测试的另一个环境： // https://jestjs.io/zh-Hans/docs/configuration#testenvironmentoptions-object
  testEnvironment: 'jsdom',
  // Options that will be passed to the testEnvironment
  // 将将传递给测试环境的选项
  testEnvironmentOptions: {
    html: '<html lang="zh-cmn-Hant"></html>',
    url: 'http://localhost/',
    userAgent: 'Agent/007'
  },

  // Adds a location field to test results
  // testLocationInResults: false,

  // The glob patterns Jest uses to detect test files Jest用来检测测试文件的GLOB模式
  testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[jt]s?(x)'],

  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
  testPathIgnorePatterns: ['/node_modules/', '/src/tscOutput/'],

  // The regexp pattern or array of patterns that Jest uses to detect test files
  // Jest用来检测测试文件的regexp模式或模式数组
  // testRegex: [],

  // This option allows the use of a custom results processor
  // testResultsProcessor: undefined,

  // This option allows use of a custom test runner
  // testRunner: "jest-circus/runner",

  // A map from regular expressions to paths to transformers
  transform: {
    '.+\\.(css|styl|less|sass|scss|svg|png|jpg|ttf|woff|woff2)$':
      require.resolve('jest-transform-stub'),
    '^.+\\.(js|ts)?$': require.resolve('babel-jest') //来告诉 Jest 用 babel-jest 处理 Js|ts 测试文件
  },

  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
  transformIgnorePatterns: []

  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
  // unmockedModulePathPatterns: undefined,

  // Indicates whether each individual test should be reported during the run
  // verbose: undefined,

  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
  // watchPathIgnorePatterns: [],

  // Whether to use watchman for file crawling
  // watchman: true,
}

module.exports = config
